Micro-electrode fabrication processes for micro-EDM drilling and milling: a state-of-the-art review

Hourmand, Mehdi; Sarhan, Ahmed A.D.; Sayuti, M.

doi:10.1007/s00170-016-9671-4

Cited by 75 publications

(31 citation statements)

References 123 publications

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“…Micro electrical discharge machining (micro-EDM) is a non-contact machining technology, which has the advantage of a small cutting force. In view of this advantage, micro-EDM has been widely used in the processing of micro structures [1,2].…”

Section: Introductionmentioning

confidence: 99%

Applying Foil Queue Microelectrode with Tapered Structure in Micro-EDM to Eliminate the Step Effect on the 3D Microstructure’s Surface

Guo

Zhu

et al. 2020

Micromachines

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When using foil queue microelectrodes (FQ-microelectrodes) for micro electrical discharge machining (micro-EDM), the processed results of each foil microelectrode (F-microelectrode) can be stacked to construct three-dimensional (3D) microstructures. However, the surface of the 3D microstructure obtained from this process will have a step effect, which has an adverse effect on the surface quality and shape accuracy of the 3D microstructures. To focus on this problem, this paper proposes to use FQ-microelectrodes with tapered structures for micro-EDM, thereby eliminating the step effect on the 3D microstructure’s surface. By using a low-speed wire EDM machine, a copper foil with thickness of 300 μm was processed to obtain a FQ-microelectrode in which each of the F-microelectrodes has a tapered structure along its thickness direction. These tapered structures could effectively improve the construction precision of the 3D microstructure and effectively eliminate the step effect. In this paper, the effects of the taper angle and the number of microelectrodes on the step effect were investigated. The experimental results show that the step effect on the 3D microstructure’s surface became less evident with the taper angle and the number of F-microelectrodes increased. Finally, under the processing voltage of 120 V, pulse width of 1 μs and pulse interval of 10 μs, a FQ-microelectrode (including 40 F-microelectrodes) with 10° taper angle was used for micro-EDM. The obtained 3D microstructure has good surface quality and the step effect was essentially eliminated.

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Section: Introductionmentioning

confidence: 99%

Applying Foil Queue Microelectrode with Tapered Structure in Micro-EDM to Eliminate the Step Effect on the 3D Microstructure’s Surface

Guo

Zhu

et al. 2020

Micromachines

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“…The main purpose of the dielectric fluid is to provide the dielectric medium and flushing out the machining debris from the work . These days micro-EDM gains more popularity because it can achieve the surface finish up to the micro level (Pham et al, 2004, Hourmand et al, 2017. The power consumption is very less in the case of micro-EDM (Liu et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Effect of Electrical and Non-electrical Parameters on the Performance Measures of Electro-Discharge Machining: A Review

Vates¹,

Aggarwal²,

Jamwal³

2017

IJTSRD

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The electrical and non-electrical parameters of EDM influence the performance of EDM. EDM is one of the widely used non-traditional machining process used for machine the hard materials which are difficult to machine by the conventional machining processes. In the past few decades EDM gains popularity because of its wide range of applications in the die-making, aerospace industry and other manufacturing sectors. It is also an alternative method of batch production when the conventional machining processes fail to machine a material. The development in the new hybrid techniques and new tool materials makes some new research scopes in the EDM. Lot of research has been done in EDM optimization, monitoring and its application area but still there are many research gaps which need further study. The aim of this paper to identify the effect of electrical and non-electrical parameters on the performance measures of EDM.

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“…Materials with electrical conductivity above 10 -2 S/cm can be machined by the EDM process [7], irrespective of the machined material chemical structure and mechanical properties (such as hardness). EDM is also characterised by very high machining accuracy and achievable surface roughness [1,11]. Another advantage of using the EDM machining method is the possibility of getting complicated shapes of elements, also with thin walls, 3-D macro, micro and nano features, which would be impossible to obtain with conventional machining methods [11,15].…”

Section: Introductionmentioning

confidence: 99%

Austenitic steel surface integrity after EDM in different dielectric liquids

Żyra

Bogucki

Skoczypiec

2017

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Austenitic steel surface integrity after EDM in different dielectric liquidsStan powierzchni stali austenitycznej po obróbce EDM w różnych ciekłych dielektrykach Abstract Electrodischarge machining (EDM) can be used as an alternative machining method compared to conventional ones, especially while very good surface integrity and high machining accuracy during machining of difficult-to-cut materials is needed. In EDM, the dielectric liquid has a crucial influence on the technological material surface integrity since it ensures the occurrence of controlled electrical discharges between the tool and the workpiece, cooling and solidification of gaseous EDM debris, removing erosion products and also dispersing heat generated during the process. In the paper, the influence of a carbonbased and a water-based dielectric liquid on the selected structural and morphological characteristics of 304 stainless steel after EDM sinking was investigated. The surface roughness, micro hardness and quality as well as the chemical changes after the corrosion test of machined surfaces were analysed.Keywords: electrodischarge machining, dielectric, surface layer, austenitic steel Streszczenie Obróbka elektroerozyjna (EDM) stanowi alternatywę dla konwencjonalnych metod obróbkowych, szczególnie przy kształtowaniu materiałów trudnoskrawalnych, gdy konieczne jest otrzymanie powierzchni o bardzo dobrej jakości. W EDM ciekły dielektryk ma kluczowy wpływ na właściwości technologicznej warstwy wierzchniej materiału obrabianego, umożliwiając zachodzenie kontrolowanych wyładowań elektrycznych pomiędzy elektrodą roboczą a przedmiotem obrabianym, schładzanie i usuwanie produktów powstałych w wyniku obróbki oraz odprowadzanie wygenerowanego w trakcie procesu ciepła. W artykule przedstawiono wpływ dielektryka węglowodorowego i wodnego na wybrane cechy strukturalne i morfologiczne stali nierdzewnej 304 po procesie drążenia elektroerozyjnego. Analizie poddano chropowatość powierzchni, mikrotwardość oraz zmiany składu chemicznego obrabianych powierzchni po przeprowadzonej próbie korozyjnej.Słowa kluczowe: obróbka elektroerozyjna, dielektryk, warstwa wierzchnia, stal austenityczna

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Micro-electrode fabrication processes for micro-EDM drilling and milling: a state-of-the-art review

Cited by 75 publications

References 123 publications

Applying Foil Queue Microelectrode with Tapered Structure in Micro-EDM to Eliminate the Step Effect on the 3D Microstructure’s Surface

Applying Foil Queue Microelectrode with Tapered Structure in Micro-EDM to Eliminate the Step Effect on the 3D Microstructure’s Surface

Effect of Electrical and Non-electrical Parameters on the Performance Measures of Electro-Discharge Machining: A Review

Austenitic steel surface integrity after EDM in different dielectric liquids

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